Improvement in compositions for fuel



UNITED STATES PATENT OFFICE.

FREEMAN BROWN, OF HAVERHILL, MASSACHUSETTS, ASSIGNCR TO HIM- SELF,SAMUEL LAUBHAM, A. WASHINGTON CHASE, AND CHARLES H.

CHASE, OF SAME PLACE.

IMPROVEMENT IN COMPOSITIONS FOR FUEL.

v Specification forming part of Letters Patent No. 1 74,348, dated March7, 1876; application filed January 17, 1876. 4

fulCompound to be- Used with Coal or Fuel for the More EconomicProduction of Heat; and I do hereby declare that the following is afull, clear, and exact description of the said compound, itsingredients, and the proportions thereof, and the mode of compoundingthe same, as well as the manner in which such compound is to be usedorcombined with the coal or fuel.

The object of my invention is to provide a compound which, when combinedor mixed with coal, tau, 8m, andthe same is consumed in the furnace of aboiler, shall generate the amount of heat or steam .req'uired, with muchless cost than canbeeffected by the employvment of the coal or fuelalone.

pounds of sawdust, in accordance with the.

kind and fineness of the coal or fnelused.

The lime, rosin, brimstone, and saltpeter are to be ground or reduced toa comminuted state, as fine as the sawdust. After having been reduced,they are to be thoroughly commingled, so as to constitute onehomogeneous mass; This having been done, the compound is ready for use.

The amount or quantity of the compound 1 to be added to the coal or fuelto produce the best results depends upon the kind and fine ness of thecoal or fuel employed. When screenings or coal-dust or tan is used, fromthree to five per cent. of the compound is a good proportion. Ifnut-coal or coke is employed, two per cent, by'weight, is a goodproportion. If stove, or a larger, coal is employed,a greater or lessamount of the compound may be used, in accordance with the intensity ofthe heat required. In all these cases the compound is to be mingled withthe 1 coal or fuel, so as to render the mass homogeneous.

With the fine dust or screenings of anthra- A mixing from three to liveper cent. of the compound with the coal I reduced the consumption of thecoal upward of thirty per cent.,

and thereby effected a saving in the running 7 FREEMAN BROWN.

Witnesses! E. G. WOOD,

AL IN B. ALLEN.

